Four Point Contact B. FAG QJ324 -N2-MPA

The FAG QJ324 -N2-MPA four-point bearing accommodates high axial loads in both directions whilst maintaining compact dimensions of 120 × 260 × 55 mm.

The QJ324 -N2-MPA four-point bearing is a specialised radial ball bearing designed to accommodate high axial forces from both directions whilst requiring minimal axial installation space. Thanks to the split inner ring, the design accommodates a particularly large number of rolling elements, whilst the solid brass cage guides the rolling elements under demanding conditions. Designed as an open bearing, the component operates within a temperature range of -30 to +200 degrees and is suitable for oil- or grease-lubricated assemblies.

When is the QJ324 -N2-MPA four-point bearing suitable for your design?

This bearing type is primarily used where predominantly alternating axial forces occur and the installation space is insufficient for double-row angular contact ball bearings. The component often serves as a pure axial bearing in combination with a separate radial bearing. In such an arrangement, the outer ring is radially unsupported within the housing, so that the bearing does not absorb any radial forces. Typical areas of application include industrial applications and bearing arrangements with varying force directions along the shaft.

What is the function of the retaining grooves and the split inner ring?

The two-piece inner ring allows the outer ring, ball cage and inner ring halves to be fitted separately, which facilitates assembly onto the 120 mm shaft. The two retaining grooves in the outer ring, offset by 180 degrees, accommodate retaining pins from the housing. This allows the outer ring to be positively secured against rotation, which is particularly crucial for axial bearing arrangements where there is radial housing play. The bearing complies with tolerance class P0/PN or ABEC 1 with standard radial clearance.